﻿<?xml version="1.0" encoding="utf-8"?>
<request method="invoice.lines.update">
  <invoice_id>99</invoice_id>
  <lines>
    <line>
      <line_id>1</line_id>
      <amount>50</amount>
      <name>Premium Yak Shaving</name>
      <unit_cost>12.50</unit_cost>
      ...
    </line>
    <line>
      <line_id>2</line_id>
      <amount>30</amount>
      <name>Advanced Telephone Sanitizing</name>
      <quantity>3.00</quantity>
      ...
    </line>
  </lines>
</request>
